Home / 28,851.30-39,755.73-21,285.69

Finding the Fourth Proportional to 28,851.30, 39,755.73 and 21,285.69

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Solution

The fourth proportional to 28,851.30, 39,755.73 and 21,285.69 is: 29,330.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,851.30 : 39,755.73 = 21,285.69 : x
  2. Step 2: Convert to fraction form
    28,851.30/39,755.73 = 21,285.69/x
  3. Step 3: Cross multiply
    28,851.30x = 39,755.73 × 21,285.69
  4. Step 4: Simplify right side
    28,851.30x = 846,228,144.50
  5. Step 5: Solve for x
    x = 846,228,144.50/28,851.30
  6. Step 6: Final answer
    x = 29,330.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.